[vtirocz]

Originally Posted by 2SS Capt

NO reason, same drive train...

Despite the same powertrain, there's definitely a reason for the difference, but Al did not elaborate when he provided technical details on the feature so all we can do is take educated guesses at why they might be different. I suspect the SS was geared for max performance in straight line so they wanted that additional inertia gained by the 6400rpm target during the shift when there's good traction (dragstrip), while on the SS 1LE the target is more in line with the engine speed of the next gear to ensure the chassis does not get upset on a road course where traction may not be as good as on a dragstrip. That's just a guess though and GM will probably never confirm their optimization strategy for the two cars.

Originally Posted by cdrptrks

I read in another thread that it is for optimizing straight line / drag racing acceleration (6400) vs. road course (5000) where you might be shifting while pulling lateral Gs in a corner and want to make sure the shift doesn't cause oversteer. Not sure if that is actually the reason or not.

I agree - this seems like the most likely scenario. The team seemed to have sweated the details on this one with different tuning even among the submodels. I personally would prefer the SS 1LE tuning for the 1-2 shift, but the SS tuning for all shifts to 3rd and higher gears. Even on the dragstrip I sometimes spin on the 1-2 shift which isn't helping my time (though when the surface prep is good, it hooks on that shift).